Canon EF 17-40mm ⨍4 L USM$ 309.00
223 grams, 7.8 oz.
Diameter x length 4.7" x 3.6"
"L-series ultra-wide-angle zoom lens that's ideal for both film and digital SLRs. Superior optics are assured by the use of three Aspherical lens elements, in addition to a Super UD (Ultra-low Dispersion) glass element. "
✓ Sized for an exact fit
✓ Comes with our sure fit zoom gear
✓ Lens element is field replaceable by simply removing the retaining ring
✓ Light weight construction
✓ CNC machined Type III hard anodized aluminum hardware
✓ Aerospace quality carbon fibre tube
✓ Supplied with Neoprene port cover
✓ Rated for a depth of 33 feet (2 ATM/BAR, 29.8 psi)
✓ Every port is pressure tested to a depth of 33 feet